JP4332856B2 - Presentation device - Google Patents

Description

  The present invention relates to a presentation apparatus that captures an image of a document such as a document or a three-dimensional object and outputs it as an image signal for document presentation during a presentation.

2. Description of the Related Art Conventionally, projection devices that are described with a marker pen on a transparent OHP sheet at a conference or academic meeting, and that are enlarged are used as presentation devices. A bright projection image is obtained by projecting directly onto a screen using a high-intensity lamp.
Recently, projection televisions that project images taken with a video camera onto a screen have come into practical use. Since the video camera can shoot opaque materials and solid objects, it is easy to create presentation materials. However, the screen brightness cannot be as high as that obtained by OHP projection. A device for making it easy to see the image projected on the screen is required by reducing the illuminance of the presentation room.

Patent Document 1 discloses a material presentation device that captures a document or a three-dimensional object with a CCD camera and reproduces the captured image on a screen or the like outside the device. The device projects the realization of a data base with a guide function that guides the operator where to place the data, and projects it as a guide pattern on the data table during the blanking interval of the CCD camera. Thus, a material presentation device is disclosed that can place a material and obtain an image in accordance with the angle of view within the field of view of the CCD camera.
JP 2002-94836 A

  However, in the material presentation device disclosed in Patent Document 1, illumination light is applied to the material during the period of photographing the material. When the illuminance of the presentation room is lowered, both the leakage light of the illumination light and the image projected on the screen can be seen from the audience seat. In particular, when a presentation using a large screen is performed in a large venue, the brightness of the projected image from the projector also decreases. The audience is prevented from concentrating on the image on the screen, for example, the light leaking from the document presentation device becomes annoying. I cannot give an effective presentation. When the document presentation device is installed in a separate room, the leakage light from the document presentation device can be made invisible to the audience, but the presentation image and the switching timing of the image are operated according to the flow of the explanation and operated by the presenter's will. Is preferred. The material presentation device is installed near the presenter. It is desired to realize a material presentation device in which illumination light for materials (hereinafter sometimes referred to as color originals and presentation papers) is difficult to leak.

  Therefore, the present invention has been made to solve the above-described problems, and the illumination light of the presentation sheet is projected on the screen even when used in a presentation room where the room illumination is turned off. It is an object of the present invention to provide a presentation device that does not hinder a presentation image and that can detect the movement of a presentation sheet and output the presentation image within a predetermined time even when illumination light is off.

  The present invention includes a mounting table, an imaging camera installed above the mounting table, a main light source that irradiates the mounting table provided below the imaging camera with visible light, and infrared light irradiation. In the presentation apparatus having the sub-light source, when the placement object is placed on the placement table, the light emitted from the sub-light source is reflected by the placement object and received from the reflected light. A detection unit that detects the movement of the object, a movement time measurement unit that detects a movement time of the placement object from the movement of the placement object detected by the detection unit, and when the main light source is in an off state, A switching control unit that switches on the main light source when a preset reference standby time for switching the main light source is exceeded with respect to the movement time measured by the movement time measuring unit. Providing a presentation system according to claim.

  According to the present invention, the detection unit that detects the movement of the placement object from the reflected light received by the reflected light reflected from the placement object, and the placement object detected by the detection unit. A movement time measuring unit for detecting the movement time of the placed object from the movement, and when the main light source is in an off state, the main light source set in advance with respect to the movement time measured by the movement time measuring unit. And a switching control unit that switches the main light source on when the reference standby time for switching is exceeded. The presentation image is not disturbed, and even if the illumination light is off, the movement of the presentation paper is detected and the presentation image is read within a predetermined time. The presentation device can be realized which can output Plantation image.

The presentation apparatus according to each embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a block diagram illustrating a configuration example of a presentation apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration example of a main part of the presentation apparatus according to the embodiment of the present invention.
FIG. 3 is an external view of the presentation apparatus according to the embodiment of the present invention.
FIG. 4 is a diagram illustrating a configuration example of the lamp unit according to the embodiment of the present invention.

  Even if the presentation device is used in a presentation room with room light turned off, the illumination light of the presentation paper does not interfere with the presentation image projected on the screen, and the illumination light is turned off. For the purpose of detecting the movement of the presentation paper and outputting the presentation image within a predetermined time, the light emitted from the sub light source is reflected by the placement object and the movement of the placement object is detected from the reflected light received. Measured by the motion time measurement unit when the main light source is in an off state, a detection time, a motion time measurement unit that detects the motion time of the placement object from the motion of the placement object detected by the detection unit When the preset standby time for switching the main light source exceeds a preset movement time, It was realized so as to have a switching control unit for switching the light source on.

The configuration of the presentation device will be described.
The presentation apparatus 1 shown in FIG. 1 includes two illumination units 11 including an LED group 11a and a lamp 11b, a document placing table 13, a camera unit 14 including a camera 14a, an infrared cut filter 14b, and a filter driving unit 14c, and processing. A unit 15, a motion detection unit 15 a, a memory 15 b, an image memory 16, an external light receiving unit 17, a control unit 18, and an operation unit 19 are configured.
The control unit 18 shown in FIG. 2 includes a motion time measuring device 181, a motion time determining device 182, a threshold setting device 183, and a lamp controller 184.

The operation of the presentation device will be described.
First, in a bright presentation room, a color manuscript (presentation paper) on which a title image of a presentation is written is placed on the manuscript placement table 13, and the lamps 11b of the left and right illumination units 11 are turned on. The camera unit 14 captures a color original and outputs an image signal. The processing unit 15 stores the input image signal in the image memory 16, and reads out and outputs the stored image signal. The output image signal is supplied to a projector (not shown) and projected onto a screen (not shown).

  A luminance signal among the image signals output from the camera unit 14 is input to the motion detection unit 15a. The motion detection unit 15a stores the luminance signal of the input image in the memory 15b, and compares the input image continuously input with the stored image stored in the memory 15b. As a result of the comparison, the motion detection unit 15a outputs still information when, for example, 3 seconds have passed since it is recognized that they are the same image. When the stationary information is input from the motion detector 15a, the controller 18 drives the filter driver 14c to remove the infrared cut filter 14b inserted in the optical axis of the camera 14a. The lamp 11b of the illumination unit 11 is turned off so as to fade out, and the LED group 11a is turned on. The camera 14a having a photoelectric conversion function for infrared light outputs an image signal related to infrared light emitted from the LED group 11a. An infrared image signal photographed with infrared light is a monochrome signal having only a luminance signal component.

  The motion detector 15a detects the motion of a signal obtained as an infrared image signal when the lamp 11b is gradually turned off (fade out) and irradiated with infrared light. Although the luminance component of the image changes as the lamp 11b is turned off, the boundary position of the subject does not change. An image in which the boundary position of the subject does not change is determined to be a still image. While outputting the still information, the image stored in the memory 15b is updated. The update is performed every 200 milliseconds, for example. Even if the illumination is switched from the lamp 11b to the LED group 11a and the level of the luminance signal changes, it is determined that the image is stationary as long as the position of the edge of the color document (presentation paper) does not change.

  Eventually, when the presentation target image is effectively presented to the audience, the presenter (presenter) dims the indoor lighting. Or turn it off. During the period when the stationary information is output, since the lamp 11b of the illumination unit 11 is turned off, there is no light leaking from the presentation device. The audience can concentrate on the presentation image projected on the screen.

  Next, the user moves toward the presentation apparatus to replace the color document, and removes the color document placed on the document table 13. The motion detector 15a detects the movement (movement) of the color document. Output motion information. The control unit 18 drives the filter driving unit 14c to insert the infrared cut filter 14b into the optical axis of the camera 14a and turn on the lamp 11b. When the next color document is placed on the document table 13 and is detected to be stationary for a predetermined time, the control operation of the lamp 11b is repeated. In the meantime, the operation of exchanging the original of the presenter and the leakage light of the lamp 11b of the presentation apparatus are visually observed by the audience. About 5 seconds later, the lamp 11b is turned off, and the presentation concentrated on the presentation image can be performed.

The control unit 18 will be described with reference to FIG.
“Still information” or “motion information” detected by the motion detector 15 a is input to the motion time measuring device 181. The threshold value setter 183 is input with a threshold value for a movement time for determining that there is movement when the operation unit 19 is operated and a threshold value for a stationary time related to a threshold value for determining a stationary state. The motion time determination unit 182 compares the duration time of the “motion information” output as having motion with the threshold time set by the threshold setting unit 183. If the duration of “motion information” exceeds the threshold time, it is determined that the color document has been moved. Based on the determination result, the lamp controller 184 is driven to turn on the lamp 11b, and the infrared cut filter 14b is inserted into the optical axis of the camera 14a. An image signal obtained by photographing a color original is output.

  The above determination is performed for both the motion amount and the motion time. When the amount of movement is greater than or equal to a predetermined amount, “movement information” is output, and when the movement information exceeds a threshold time, it is determined that the color document has been moved. If the movement amount threshold is set to a small value, “movement information” is output when the document moves slightly, such as when the user touches the document. Also, the hand may cross the field of view of the camera 14a during the presentation. Also in this case, “motion information” is output. The original image is obtained after the hand crosses the field of view of the camera 14a. The output “motion information” time is short. By comparing the time in which “motion information” exists continuously with a threshold, it is possible to correctly determine the movement of the color document. Undesirable repetition of on / off of the lamp 11b can be prevented. For example, when it is detected that 70% of the entire image matches the threshold for the amount of motion, “motion information” is not output. The threshold time is preferably set to about 3 seconds, for example.

The appearance of the presentation apparatus will be described with reference to FIG.
A presentation manuscript is placed on the manuscript placement table 13, illumination light is emitted from the illumination unit 11, and the camera unit 14 takes a picture. There is an external light receiving unit 17 on the opposite side of the illumination unit 11 that irradiates the illumination light, and detects indoor illumination light (external light) there. The control unit 18 performs on / off control of the lamp 11b according to the detected brightness of the room light. You may enable it to set the brightness of the room light which starts the on / off control of the lamp | ramp 11b by operating the operation part 19. FIG.

The illumination unit 11 will be described with reference to FIG.
In the figure, a lamp 11b is arranged at the center. LED groups 11a that emit infrared light are arranged above and below the lamp. In addition, when using high-intensity infrared light emitting LED, the number of LEDs can be reduced.

  Here, the camera 14a uses a camera called a day and night continuous camera. It operates as a color camera during the daytime and shoots subjects that are illuminated with infrared light at night. A CCD (Charge Coupled Device) used in the camera 14a has photoelectric conversion characteristics from visible light to infrared light. When photographing a color image with visible light, an infrared light removal filter 14b is disposed on the optical axis of the camera 14a in order to prevent the influence of the luminance level (Y signal) due to infrared light. A signal picked up by infrared light is output as a signal (Y signal) of only a luminance signal.

  The above mainly describes the operation when the room is dark. When the outside light receiving unit 17 detects that the room is bright and the lamp 11b is not completely turned off and the movement time measuring device 181 can measure the amount of movement by the image signal of the camera 14a, the LED group 11a is turned on, There is no need to insert or remove the infrared cut filter 14b. The motion time determination unit 182 only needs to be able to perform the motion determination at the set threshold time, and even if the S / N of the signal output from the camera 14a is deteriorated, the motion time determination unit 182 performs the averaging luminance signal. It is only necessary to be able to make a determination based on.

  As described in detail, according to the presentation apparatus described in the present embodiment, the detection unit 15a that detects the movement of the placement object from the reflected light received by the light emitted from the sub-light source being reflected by the placement object; The movement time measurement unit 181 that detects the movement time of the placement object from the movement of the placement object detected by the detection unit, and the movement time measurement unit when the main light source is in an off state. And a switching control unit 184 for switching on the main light source when a preset reference waiting time for switching the main light source with respect to the movement time is exceeded. However, the illumination light of the presentation paper does not interfere with the presentation image projected on the screen and the illumination light is turned off. In state by detecting the movement of the presentation sheet can realize a presentation device capable of outputting the captured presentation image within a predetermined time.

  The present invention can be applied to a material presentation device that captures materials such as documents and three-dimensional objects and outputs them as image signals for material presentation during presentation.

It is a block diagram which shows the structural example of the presentation apparatus which concerns on implementation of this invention. It is a block diagram which shows the structural example of the principal part of the presentation apparatus which concerns on implementation of this invention. 1 is an external view of a presentation device according to an embodiment of the present invention. It is a figure which shows the structural example of the lamp | ramp part which concerns on implementation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Presentation apparatus 11 Illumination part 11a LED group 11b Lamp 13 Original mounting table 14 Camera part 14a Camera 14b Infrared cut filter 14c Filter drive part 15 Processing part 15a Motion detection part 15b Memory 16 Image memory 17 External light receiving part 18 Control part 19 Operation 181 Movement time measuring unit 182 Movement time determination unit 183 Threshold setting unit 184 Lamp controller

Claims (1)

A mounting table; an imaging camera installed above the mounting table; a main light source that irradiates the mounting table provided below the imaging camera with visible light; and a sub-light source that irradiates with infrared light. In a presentation device having
When a placement object is placed on the placement table, a detection unit that detects the movement of the placement object from reflected light received and reflected by the placement object when the light emitted from the sub-light source is reflected by the placement object;
A movement time measurement unit that detects a movement time of the placement object from the movement of the placement object detected by the detection unit;
Switching control for turning on the main light source when a preset reference waiting time for switching the main light source is exceeded with respect to the movement time measured by the movement time measuring unit when the main light source is in an off state And
A presentation apparatus characterized by comprising:

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